Method: ContentServer.run_backup_server

Defined in:
lib/content_server/backup_server.rb

.run_backup_server ⇒ Object 



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# File 'lib/content_server/backup_server.rb', line 30

def run_backup_server
  Log.info('Start backup server')
  Thread.abort_on_exception = true
  all_threads = []

  # create general tmp dir
  FileUtils.mkdir_p(Params['tmp_path']) unless File.directory?(Params['tmp_path'])
  # init tmp content data file
  $tmp_content_data_file = File.join(Params['tmp_path'], 'backup.data')

  if Params['enable_monitoring']
    Log.info("Initializing monitoring of process params on port:%s", Params['process_monitoring_web_port'])
    $process_vars.set('server_name', 'backup_server')
  end

  # # # # # # # # # # # #
  # Initialize/start monitoring and destination folder
  Params['backup_destination_folder'][0]['path']=File.expand_path(Params['backup_destination_folder'][0]['path'])
  Log.info("backup_destination_folder is:%s", Params['backup_destination_folder'][0]['path'])
  #adding destination folder to monitoring paths
  Params['monitoring_paths'] << Params['backup_destination_folder'][0]
  Log.info('Start monitoring following directories:')
  Params['monitoring_paths'].each { |path|
    Log.info("  Path:'%s'", path['path'])
  }

  # initial global local content data object
  $local_content_data_lock = Mutex.new
  $local_content_data = ContentData::ContentData.new
  $last_content_data_id = $local_content_data.unique_id

  # Read here for initial content data that exist from previous system run
  content_data_path = Params['local_content_data_path']
  if File.exists?(content_data_path) and !File.directory?(content_data_path)
    Log.info("reading initial content data that exist from previous system run from file:%s", content_data_path)
    $local_content_data.from_file(content_data_path)
    $last_content_data_id = $local_content_data.unique_id
  else
    if File.directory?(content_data_path)
      raise("Param:'local_content_data_path':'%s' cannot be a directory name", Params['local_content_data_path'])
    end
    # create directory if needed
    dir = File.dirname(Params['local_content_data_path'])
    FileUtils.mkdir_p(dir) unless File.exists?(dir)
  end

  Log.info("Init monitoring")
  fm = FileMonitoring::FileMonitoring.new()

  # Start monitoring and writing changes to queue
  all_threads << Thread.new do
    fm.monitor_files
  end

  # # # # # # # # # # # # # # # # # # # # # # # #
  # thread: Start dump local content data to file
  Log.debug1('Init thread: flush local content data to file')
  all_threads << Thread.new do
    FileUtils.mkdir_p(Params['tmp_path']) unless File.directory?(Params['tmp_path'])
    loop{
      sleep(Params['data_flush_delay'])
      ContentServer.flush_content_data
    }
  end

  #initialize global - remote content data
  $remote_content_data_lock = Mutex.new
  $remote_content_data = ContentData::ContentData.new
  remote_content = ContentServer::RemoteContentClient.new(Params['content_server_hostname'],
                                                          Params['content_server_data_port'],
                                                          Params['backup_destination_folder'][0]['path'])
  all_threads.concat(remote_content.run())

  file_copy_client = FileCopyClient.new(Params['content_server_hostname'],
                                        Params['content_server_files_port'])
  all_threads.concat(file_copy_client.threads)

  # Each
  Log.info('Start remote and local contents comparator')
  all_threads << Thread.new do
    loop do
      sleep(Params['backup_check_delay'])
      $local_content_data_lock.synchronize{
        $remote_content_data_lock.synchronize{
          diff = ContentData.remove($local_content_data, $remote_content_data)
          unless diff.nil? || diff.empty?
            Log.debug2("Backup content:\n%s", $local_content_data)
            Log.debug2("Remote content:\n%s", $remote_content_data)
            Log.debug2("Missing contents:\n%s", diff)
            Log.info('Start sync check. Backup and remote contents need a sync, requesting copy files:')
            file_copy_client.request_copy(diff)
          else
            Log.info("Start sync check. Local and remote contents are equal. No sync required.")
          end
          diff = ContentData::ContentData.new  # to clear the memory
        }
      }
    end
  end

  # # # # # # # # # # # # # # # # # # # # # # # #
  # Start process vars thread
  if Params['enable_monitoring']
    monitoring_info = MonitoringInfo::MonitoringInfo.new()
    all_threads << Thread.new do
      ContentServer.monitor_general_process_vars
    end
  end

  all_threads.each { |t| t.abort_on_exception = true }
  all_threads.each { |t| t.join }
  # Should never reach this line.
end